If there were single posts for every little item like this, the front page of the deals section would be a complete mess. You don't like weeding through pages of store threads. If little things like this get their own thread, you'll be weeding through pages of threads. What's easier, putting all deals in store threads or having 20 new deal threads a day.
Post in the store threads, it's just dumb to make separate threads for a $14 pair of tape measures that are not even on sale, they are regular price.
A separate thread for a big item like the milwaukee tool box makes sense but no for trinkets.